Sorry, but you’re blaming the wrong ones. There is an SDK and Microsoft/Asobo offer even a Marketplace and praise/promote contents there and talk about third party aircraft being released in their development updates.
They ADVERTISE the use of the SDK to create and release content instead of saying everyone to wait for the SDK to be finalized, but didn’t seem to bother coping with the results that 3rd party is already heavily relying on it. Seems like now they’ve gotten aware of the issues at least, so let’s hope there will be a solution for that. Bad enough that it had to come so far.
By no means should one expect that it is “too early” for 3rd party devs to release anything. That’s all on Asobo/Microsoft for their communication and regression testing.
I love the sim and also participate on a free mod for a default aircraft. All I expect and hope for is to have a pre-release patch provided to developers or whoever wants to test and provide feedback. Now that most game-breaking bugs are ironed out, it shouldn’t be an issue to have each patch in beta-testing for a week prior releasing it to all users.
That’s just common practice in IT development where canary releases, betas, proper release notes and backwards compatibility are exactly the way to avoid these issues professionally.